From ddd46d3eecada1bc2f32cd7d7245846c699ab51a Mon Sep 17 00:00:00 2001
From: dchagin <dchagin@ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f>
Date: Sat, 2 Apr 2016 06:15:14 +0000
Subject: [PATCH] MFC r297296:

Implement O_NONBLOCK flag via fcntl(F_SETFL) for eventfd object.


git-svn-id: svn://svn.freebsd.org/base/stable/10@297502 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f
---
 sys/compat/linux/linux_event.c | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/sys/compat/linux/linux_event.c b/sys/compat/linux/linux_event.c
index 1fe34457e..a089d4383 100644
--- a/sys/compat/linux/linux_event.c
+++ b/sys/compat/linux/linux_event.c
@@ -41,6 +41,7 @@ __FBSDID("$FreeBSD$");
 #include <sys/types.h>
 #include <sys/file.h>
 #include <sys/filedesc.h>
+#include <sys/filio.h>
 #include <sys/errno.h>
 #include <sys/event.h>
 #include <sys/poll.h>
@@ -868,8 +869,24 @@ static int
 eventfd_ioctl(struct file *fp, u_long cmd, void *data,
 	struct ucred *active_cred, struct thread *td)
 {
+	struct eventfd *efd;
 
-	return (ENXIO);
+	efd = fp->f_data;
+	if (fp->f_type != DTYPE_LINUXEFD || efd == NULL)
+		return (EINVAL);
+
+	switch (cmd)
+	{
+	case FIONBIO:
+		if (*(int *)data)
+			efd->efd_flags |= LINUX_O_NONBLOCK;
+		else
+			efd->efd_flags &= ~LINUX_O_NONBLOCK;
+	case FIOASYNC:
+		return (0);
+	default:
+		return (ENXIO);
+	}
 }
 
 /*ARGSUSED*/
-- 
2.45.0